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Migrating SBS2k8 to Windows 2012 (Domain Controller/File server) & Windows 2012 (Exchange 2016).

Posted on 2016-08-15
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Last Modified: 2016-08-22
Hello,

I am in the final phases of migrating a Windows 2008 SBS to a Windows 2012 environment with Exchange 2016.  

- I have already migrated to Exchange 2013.  Exchange 2007 has been uninstalled from SBS2k8.
- FSMO is still being held by the SBS2k8.  I plan to migrated those roles as the final step.

I am now in the process of migrating from Exchange 2013 to Exchange 2016.  Part of this process requires that the Domain and Forest functional level are at 2008.  I see that it is still running at 2003 functional level.  

My questions:
1. Should I be concerned about upgrading Forest/Domain functional levels to 2008 if the SBS 2008 is still in the environment?
2. Would it be a better approach to first decommission the SBS2k8 and move FSMO?  I would really like to have Exchange 2016 up and running and then leave the decommissioning of the SBS2k8 for the end.

Thanks in advance.

Regards,
Real-Timer
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Question by:realtimer
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Adam Brown earned 500 total points
ID: 41756583
1. No. Upgrading functional level almost never causes problems. SBS runs on Server 2008, so should accept the upgrade.
2. SBS2008 pitches a fit if it doesn't hold all the FSMO roles. If you haven't gone through the process required to extend the running period that SBS will allow other servers to hold FSMO roles for, you should decom that server before migrating. SBS is a crippled monster of a pain, so the sooner you can get it off the network, the better off you'll be.
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by:realtimer
ID: 41765813
Thank you much!
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